| 摘要 |
PURPOSE:To enable an endless belt to rotate smoothly without lateral slip while stopping always a pattern at a predetermined position in the stoppage of the rotation by providing a mechanism consisting of a plurality of endless belts trained over belt pulleys and having holes at equal intervals in both ends engaging sprocket wheels, and capable of adjusting the positions of upper and lower side belt pulleys. CONSTITUTION:A partition plate 3 is provided in the central part with stepping motors 10, 10, 10 to the rotary shafts of which are attached respectively nearly cylindrical sprocket wheels 12, 12, 12 having diameter larger than that a of flanged belt pulleys 6, 8. The sprocket wheels 12 are provided on both cylindrical peripheral edge at equal intervals with circumferential trapezoindal and parallel teeth. A position detecting means 20 is attached to a position detecting mechanism. A bearing 6a of the belt pulley 6 is attached to the central part of a mounting plate 21 and a bolt inserting hole 21a is provided in the other end of the mounting plate 21. Thus, a pattern can be stopped in a predetermined positions when the rotary shaft is stopped. |
